Question

Using this matrix. A = a b c d e f g h i Suppose that...

Using this matrix.
A =
a b c
d e f
g h i


Suppose that det(A) = 5. Find the determinant of the following matrix.
B =
a + 3g b + 3h c + 3i
-g -h -i
4d 4e 4f
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